When a pronoun serves as the object of a prepositional phrase, it must be in the case. a. subjective b. objective c. possessive

the answer is a hope that helps

  this riddles' answer is library.

  the "leaves" are a reference to the books' pages that the library contains; the branches are a network of libraries that connect multiple libraries' collections, resources, and items in a system of a common database, integrating them; the branches' organization are a useful management tool for coordinating the multiple collections many libraries have.